An abusive player who was mic spamming our server last night stated in chat that he was "crash the server"

Anyways, immediately upon taking admin action on him (banning him) at 2300 12/15/10, the server appeared to be DDoS'd. This went on till about 0630 12/16/10.

The server showed as Timeout and restarting the server immediately showed ping between 600-2500. While I was working on the server, trying to figure out what was causing this issue, I had not yet been made privy to this players threats and possible actions.

I thought that a plugin must be causing the issue, maybe KAC or SM updating and stuck in a loop of sorts. Anyways, I sm plugins unload kigen-ac-pub and immediately the server's ping returned to normal. sm plugins load kigen-ac-pub and everything was still fine.

Is there a way this player could have executed a script/command specific to KAC that would cause KAC to freak out and throw the ping so high and timeout the server and appear like a DDoS?

I can provide the players SteamID in a prvmsg if needed. There is nothing in the KAC logs regarding this player